Celestron NexStar 4SE 102mm f/13 Maksutov-Cassegrain GoTo Telescope

Celestron NexStar 4SE 102mm f/13 Maksutov-Cassegrain GoTo Telescope

Celestron NexStar 4SE 102mm f/13 Maksutov-Cassegrain GoTo Telescope

B&H # CEN4SE MFR # 11049
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Product Highlights

  • 102mm Maksutov-Cassegrain Telescope
  • 1325mm Focal Length, f/13 Focal Ratio
  • StarBright XLT Optical Coating System
  • NexStar+ Computer Hand Controller
  • 40,000+ Object Database with Sky Tours
  • SkyAlign Alignment Technology
  • Multiple Slew and Tracking Rates
  • Single-Fork Motorized GoTo Alt-Az Mount
  • 25mm Eyepiece, StarPointer Finder
  • Stainless Steel Tripod with EQ Wedge
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Celestron 4SE overview

  • 1Description

Celestron's NexStar 4SE 125mm f/13 Maksutov-Cassegrain GoTo Telescope is a powerful, versatile, and user-friendly catadioptric-style scope that can be used for observing everything from the Moon and planets to bright deep-sky objects like stars, galaxies, and nebulae. Using Celestron's proprietary StarBright XLT multi-coating system, light transmission is increased throughout the entire optical path with anti-reflection multi-coated lenses, highly reflective multi-coated mirrors, and crown optical glass elements. Similar to their Schmidt cousins, the Maksutov design exchanges the conventional front corrector plate with a convex meniscus lens, which results in a smaller secondary mirror—limiting obstruction and increasing contrast, while eliminating the need for periodic collimation. While the focal ratio is a relatively slow f/13, the scope's optical performance, added to the mount's precision tracking system and integrated equatorial wedge, allows it to be a competent astrophotography/imaging platform for the Moon and planets.

Driving the dual servo motors on the mount is the brain of the NexStar 4SE: the iconic NexStar+ computer hand controller. Packed with 40,000+ celestial objects, it can hold up to 100 additional user-defined destinations and is updatable via the Celestron website. It has multiple alignment procedures to get you observing fastincluding the super-easy SkyAlign system. Capable of being used in the Northern or Southern Hemispheres, the NexStar has sidereal, lunar, and solar tracking speeds to accurately follow near- and deep-sky objects, plus nine slew speeds and the ability to automatically trigger a camera's shutter release for Fastar or piggyback wide-field photography or conventional prime-focus astrophotography.

  • 4" (102mm) aperture
  • f/13 focal ratio
  • 1325mm focal length
  • Maksutov-Cassegrain optical system
  • Front convex meniscus lens corrects spherical and chromatic aberrations and comas (off-axis aberration) across the entire field of view
  • Smaller secondary mirror versus Schmidt-Cassegrain reduces obstructions and increases contrast
  • BK7 optical glass primary mirror
  • StarBright XLT optical coatings: Multi-layer aluminum/SiO2 (quartz)/TiO2 (titanium dioxide) mirror coatings with flat reflectivity across the light spectrum for both astrophotography/astroimaging and visual observation
  • Multi-layer MgF2 (magnesium fluoride) and HfO2 (hafnium dioxide) anti-reflective lens coatings
  • High-transmission water white glass corrector lens with 97.4% light transmission
  • Resolution: Rayleigh: 1.36 arcsec / Dawes: 1.14 arcsec
  • Secondary mirror obstruction: 1.25", 34.4% by diameter, 11% by area
  • Internal 90° flip mirror: With the mirror flipped up, the 90° angle puts head in a comfortable viewing position when scope is pointed at or near the zenith; lay the mirror down to direct light to the visual back for astrophotography/imaging
NexStar+ Computer Controller
  • 2-line, 16-character LCD display
  • 19 fiber optic backlit red LED buttons
  • Database of over 40,000 celestial objects plus 100 user defined
  • Automatically slew to planets, stars, constellations, and a variety of catalogs
  • Camera control: For piggyback wide-field or conventional astrophotography through the optical tube assembly, the controller can automatically trigger the shutter release to capture the image
  • Anti-backlash compensation programs out play between gears for more precise tracking
  • Tour Mode: Shows a selection of the most popular objects for the time and date you are observing
  • Constellation Tour: Allows you to take a tour of all the best objects within a particular constellation
  • Alignment procedures: SkyAlign, Auto 2-Star, 1-Star, 2-Star, and Solar System
  • SkyAlign alignment: Takes minutes, with minimal effort or experience—point the telescope at three bright objects in the sky, and the telescope does the rest
  • Nine slew speeds: 4°/sec, 2°/sec, 1°/sec, 0.5°/sec, 2x, 4x, 8x, 16x, and 32x
  • Sidereal, Solar, and Lunar tracking rates for observing the fast-moving Moon, to slower-moving deep-space subjects
  • Tracking modes: Alt-Az (default, for general GoTo use), EQ North (use for long-exposure astrophotography in Northern Hemisphere with EQ wedge engaged), EQ South (use for long-exposure astrophotography in Southern Hemisphere with EQ wedge engaged), Off (no tracking when using as a terrestrial spotting scope)
  • RS-232 communication port allows for computer control
  • Flash updatable via the Celestron website

Database Details:

  • Solar system objects including the Sun, Moon, and planets
  • Named objects
  • Stars: Asterims, variable stars, double stars, named stars
  • Caldwell catalog
  • Messier catalog
  • NGC catalog
  • SAO catalog
  • Constellations


Mount & Tripod
  • Single-fork alt-az
  • Dual-axis servo motors allow for precise tracking with virtually no vibration
  • Motor resolution: 0.26 arcsec
  • Optical encoders track mount movement to improve tracking and GoTo accuracy while allowing the mount to maintain alignment when moved manually
  • Communication ports: Autoguider port, Aux port, hand controller
  • Runs on eight user-supplied AA batteries or optional 12 VDC power supply
  • Stainless steel legs
  • Adjustable height accommodates a variety of observation positions or users
  • Built-in equatorial wedge enables more precise tracking accuracy during long-exposure astrophotography
  • Tray holds accessories such as eyepieces and filters and adds stability and vibration reduction
  • Weight: 10 pounds
Included Accessories
  • 1.25" diameter barrel
  • 25mm focal length produces 53x magnification
  • Anti-reflection multi-coated glass improves color rendition and contrast
  • Threaded barrel accepts most 1.25" astronomical filters
  • Fold-down rubber eyecup for use with or without eyeglasses
StarPointer Finder
  • Projects a single red dot in line of sight
  • Unmagnified to make finding objects faster and easier
  • Used primarily for alignment process


UPC: 050234110495
In the Box
Celestron NexStar 4SE 102mm f/13 Maksutov-Cassegrain GoTo Telescope
  • E-Lux 25.0mm 1.25" Eyepiece sadtbeuvcycvcdvrffzbtuurzzefasyaetd
  • StarPointer Finderscope
  • NexRemote Control Software CD
  • The Sky CD-ROM Software for Windows
  • RS-232 to Serial Port Cable - for GPS 16 Accessory
  • NexStar+ Hand Controller
  • Tripod with Accessory Tray
  • Limited 2-Year Warranty
  • Table of Contents
    • 1Description

    Celestron 4SE specs

    Optical Tube Assembly
    Optical Design Maksutov Reflector
    Aperture 102 mm / 4"
    Focal Length 1325 mm
    Focal Ratio f/13
    Eyepiece Barrel Diameter 1.25"
    Diagonal Yes, 90 Star
    Finderscope Yes
    Optical Tube Dimensions Length: 13.5" / 342.9 mm
    Type Motorized; Alt-Azimuth Single Fork
    GoTo Capability Yes, NexStar+ controller
    Material of Tripod Stainless Steel
    Batteries 8 x AA
    Weight 10.0 lb / 4.5 kg (Tripod)
    21.0 lb / 9.5 kg (Fully Assembled)
    Packaging Info
    Package Weight 38.0 lb
    Box Dimensions (LxWxH) 32.0 x 27.5 x 13.5"

    Celestron 4SE reviews

    NexStar 4SE 102mm f/13 Maksutov-Cassegrain GoTo Telescope is rated 4.6 out of 5 by 16.
    Rated 3 out of 5 by from Best Choice for Plain Fun I bought this for casual observing and to get my kids interested in astronomy. It fits the bill perfectly. Super compact, easy to transport and set up, and easy to get observing soon after setup. Very solidly built. Better optics than the 3-in refractor I owned previously. Only optical limitation is the size; the collimation was good from the factory and the glass shows no flaws. I star-tested it as soon as I took it out of the box and it looked good. I've dialed in everything I can find that the textbooks say you can resolve with a 4 in scope and they all look good. Only real competition is the Meade ETX, which has smaller apereture but basically the same features at this price point. I thought the ETX build seemed flimsier but the optics were comparable. The only con is that the computerized controller is not as easy as it looks, and the two-star alignment procedure isn't as easy as the sales pitch says, but this is a problem with all GOTO scopes and not this one in particular.
    Date published: 2009-12-30
    Rated 5 out of 5 by from Great telescope for a starter like me We purchased this at B&H after looking at several options in the store. A few reasons why we choose this one. 1) Ease of setup is superior. I set this up for the first time on a cold dark evening in about 1 hour. The stand is solid and makes for frustration free setup. 2) Quality components are included in this scope. The tripod is near professional grade, the optics are crisp, the motion is very accurate and repeatable. You will be nothing but pleased with the quality. 3) The Celestron motion controller is very intuitive and easy to use. You will be viewing celestial objects very quickly. We used solar system object setup for the first time and within an hour had great views of the moon, Mars, Venus, Jupiter, and its Galilean moons. 4) Very compact and packed away very well. Overall, I'm very impressed.
    Date published: 2015-12-13
    Rated 5 out of 5 by from Watching the Cosmos This scope is small enough to be fairly easily portable, yet strong enough to allow you to view some very interesting stars and planets. The belts of Jupiter are very prominent as are the rings of Saturn. The go-to feature is superb. I used to have an 8 Schmidt-Cassegrain but didn't use it very much because it was too bulky and heavy to set up and use. I am very, very happy with this telescope.
    Date published: 2010-08-04
    Rated 4 out of 5 by from Excelent for starters I bought this for casual observing and is my first telescope. It is fairly easy to set up and has good optics. Being compact does not mean easy to transport off the shop: it comes in a rather large carton box with 2 large boxes (tripod legs and the telescope mounted on altazimuth arm) and 2 small boxes (documentation and accessories, filler) inside. It is difficult to fit on a car trunk, but on the other hand, it survived an air flight abroad to Brazil.
    Date published: 2010-04-12
    Rated 4 out of 5 by from Great beginner telescope Good first scope. It is still a lot of money but I am sure it will be worth it. I live just 20 miles from Manhattan and still within the 5 boroughs. Had no problem seeing stars the night I purchased the scope. Took some pictures of the moon with it and the images were very sharp. The mount uses a lot of batteries. Would recommend getting an alternative power source.
    Date published: 2016-06-20
    Rated 5 out of 5 by from We are enjoying this telescope. I purchased this telescope for my son on his birthday. It has been easy to use and set up. I need an additional eye piece for planetary viewing but Jupiter still looks good through the 25mm that came with it. The sky align works flawlessly and goes to where you ask it to go. Would certainly recommend this to anyone.
    Date published: 2016-04-18
    Rated 5 out of 5 by from Excellent quality and value Great buy! I really like it. It's small and light enough to easily set up and move around. Very good build quality. Included eyepiece is very good as is the really nice tripod. GoTo works well and the hand controller has a USB port for upgrades. The included Celestron version of Starry Night Version 7 is very useful and a superb educational tool. The partial moon was stunning last night.
    Date published: 2017-09-26
    Rated 4 out of 5 by from pretty good The eye piece is not very impressive. Battery is short of life.
    Date published: 2013-11-18
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